34 Nearktische Region. America. 



Fauna boreali-americana by Kirby. IV. 1S37 p. 128. 



ß. Aposterna^) Kirby. Family Sericidae. Sericidans. 



LXIX Campt orhina Kirb. 



Labrum transverse, emarginate. 



Mandibles very shoi't, subtrigonal, curving, withoiit teeth; molary 

 Space subtriangular, surface furrowed, the outer raargin appearing 

 denticulated from the ridges of the furrows being more elevated there, 

 on the opposite side there appears to be a kind of Channel. 



Maxillae linear, incurved at the tip and terminating in four 

 stout teeth. 



Labium oblong, forming one piece with the mentum; narrowed, 

 subemarginate, and sloping inwards at the apex. 



Palpi maxillary, four-pointed, gradually incrassated : tirst Joint 

 very minute, second obconical; third of the lenght of the second, 

 thicker; fourth as long as the second and third together, rather 

 oblong. 



Palpi labial, three-jointed, filiform: last Joint as long as the two 

 first together. 



Antennae nine-jointed; scape much incrassated at the apex; the 

 pedicel less incrassated, spherical-oblong; the two following joints 

 rather filiform; the fifth and sixth shorter and inclining to pateriform; 

 and the three last elongated and forming a rather slender knob. 



Body oblong, subcylindrical. Head inserted, subtriangular, with 

 the Vertex of the triangle anterior, truncated; nose short, transverse, 

 distinct, reflexed, separated from the postnasus on each side by a 

 cleft; nostrilpiece inflexed, transverse, and nearly vertical; postnasus 

 distinct, depressed, curved; front convex; e}es subhemispherical; 

 canthus septiform; prothorax transverse, with an anterior sinus 

 taken from its whole width to receive the head, posteriorly subrepand: 

 scutellum an isosceles triangle : elytra linear : breast-bones not pro- 

 minent : medipectus or midbreast elevated ; legs thus located :":; 

 tarsi subsetaceous; claws two, very short, incurved, each bifid or 

 bipartite, with the lobes acute : podex only partly covered. 



This genus is very nearly related to Serica of W. S. Mac Leay. 

 It differs, however, in the number of teeth that terminate the 

 maxillae, having only four instead of six; in having both the lobes 

 of the claws that arm the tarsi acute, whereas in that genus the 

 inner one is truncated, and in having none of the silky bloom which 

 the species of Serica usually exhibit. Mr. Mac Leay speaks of its 



•1) This tribe distinguished by having no prominent prosternum or 

 mesosterum. 



